EP0014960A1 - Dispositif de couplage de deux guides d'ondes optiques - Google Patents

Dispositif de couplage de deux guides d'ondes optiques Download PDF

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Publication number
EP0014960A1
EP0014960A1 EP80100741A EP80100741A EP0014960A1 EP 0014960 A1 EP0014960 A1 EP 0014960A1 EP 80100741 A EP80100741 A EP 80100741A EP 80100741 A EP80100741 A EP 80100741A EP 0014960 A1 EP0014960 A1 EP 0014960A1
Authority
EP
European Patent Office
Prior art keywords
coupling
optical
optical waveguide
fiber
plastic part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80100741A
Other languages
German (de)
English (en)
Inventor
Rasmus Dr. Beck
Hans Nagel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harting Electronics GmbH and Co KG
Original Assignee
Harting Electronics GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harting Electronics GmbH and Co KG filed Critical Harting Electronics GmbH and Co KG
Publication of EP0014960A1 publication Critical patent/EP0014960A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends

Definitions

  • the invention relates to a device for coupling two optical fibers, each of which is axially aligned and arranged centrally in a plug pin and has a self-focusing part at the end to be coupled.
  • optical fibers are used as a transmission medium in modern communication technology. Such transmission links must be easily separable at certain points, for example to set up branches and carry out repairs. Coupling devices are provided for connecting the fiber end pieces, to which special requirements have to be made. The transmission losses must remain as low as possible, for example less than 1 dB, and the plug frequency should be sufficiently high without deteriorating properties. Furthermore, the coupling element should have small external dimensions, enable simple installation even under field conditions and should not be susceptible to misalignments and contamination. In addition, such a coupling connection should be usable for all common fiber types without the need for special adapter parts.
  • this accuracy is achieved by adjusting the fiber end under microscopic observation or the stripped fiber ends are placed in a V-groove and fixed by means of mechanical pressure or magnetic force (DE-PS 25 31 857, DE-OS 26 46 010).
  • a considerable reduction in the requirements for the mechanical accuracy of an optical connector can be achieved if the two fiber ends are imaged on one another by means of two focusing elements.
  • These focusing elements e.g. Coupling lenses, firmly connected to the respective fiber end, so that the focal point of the lens lies on the fiber end face.
  • the interface of the coupler then lies between the parallel beam path for the lenses.
  • Corresponding arrangements with microlenses and rod lenses are known (DE-OS 27 11 171, DE-OS 26 06 255, DE-OS 27 22 367, DE-OS 27 03 887). These lenses have the disadvantage that the refractive effect is caused by curved interfaces between two media of different refractive index, generally glass / air. There are reflection losses that can only be reduced by vapor deposition with anti-reflective coatings.
  • Gradient lenses do not have this disadvantage.
  • the end faces are flat so that all interfaces can be fitted without an air gap.
  • the gradient lenses are generally used for coupling optoelectronic construction elements, such as detectors, light emitting diodes, used (DE-OS 23 60 951, US-PS 40 60 309).
  • the present invention is therefore based on the object, while avoiding the disadvantages of known arrangements, of specifying a plug-in connection for optical waveguides which, on the one hand, enables optimal alignment on a common optical axis and, on the other hand, permits problem-free separation and reassembly of the fiber ends without additional adjustment measures.
  • FIG. 1 in cross section the device according to the invention with the optical fiber uncoupled.
  • the connector according to the invention is essentially composed of three parts, namely a spring sleeve 1 and two identical coupling elements containing the fiber ends,
  • a coupling element is also shown in Figure 1. It consists of the outer plug pin 2 of approximately 2 mm in diameter, in which a self-focusing glass rod 3, for example a Selfoc line, is embedded at the end to be coupled.
  • a self-focusing glass rod 3 for example a Selfoc line
  • the divergent light bundle emerging from the fiber 4 is converted into a collimated beam with a larger cross section.
  • This beam is then in the receiving coupling element with a similar gradient lens focused on the entry surface of the fiber to be coupled.
  • the front of this gradient lens 3 is covered with a thin layer 5.
  • This covering preferably consists of transparent silicone rubber and has a slightly convex outer surface in the uncoupled state.
  • the silicone layer 5 protects the glass end surface from damage and at the same time provides good optical contact between the two coupling elements. If both silicone surfaces are pressed together when coupling such a connection, reflection losses can largely be eliminated.
  • the optical fiber 4 to be coupled is placed centrally and cemented to the glass surface.
  • Optimal coupling of the fiber to the lens is achieved by using a cement with an adapted refractive index, e.g. with a transparent adhesive made of epoxy resin or silicone rubber.
  • the fiber should be machined and optically polished.
  • the fiber is centered with a plastic part 6 which, like the gradient lens 3, is inserted into the plug pin 2.
  • This plastic part can be manufactured, for example, as a precision injection molded part. It is provided with a stepped bore 7. The transition from the larger to the smaller part of the bore is tapered. The stripped fiber end is inserted into the narrower hole.
  • the bore diameter is dimensioned at 0.5 mm so that all conventional fiber types can be accommodated.
  • the fiber with the fiber protection jacket 8 made of nylon or Tefzel and the like is introduced into the further bore of approximately 1 mm in diameter.
  • the plastic part 6, which is preferably made of a deformable material, e.g. Allaton, is then subjected to a controlled deformation, with the aim of uniformly reducing the inside diameter from all sides and adapting to the different fiber diameters.
  • the fiber end is optimally centered on the end face of the gradient lens 3 and good mechanical fixation is achieved.
  • the plastic part 6 is deformed e.g. by axial pressure.
  • a pressure sleeve 9 is inserted into the connector pin 2, which compresses the plastic, whereby the inner wall of the bore fits tightly against the fiber end.
  • a plastic material is used that can be converted into a state with increased volume, for example by heating, for example by swelling or foaming. So that this process is as isotropic as possible heat is carried out in a suitable small oven.
  • the plug pin 2 is provided with a holding flange 10, which can either be integrated or detachably designed as a spring ring. Due to the relatively small external dimensions of approx. 2 mm diameter and 10 mm length, the coupling element can be found in almost all housings commonly used for electrical connectors, e.g. BNC, SM, Min D, seat.
  • the coupling element is inserted floating into the connector housing.
  • the centering of both coupling elements of a plug connection on one another is carried out by a separate spring sleeve 1.
  • This spring sleeve is pushed onto one of the two coupling elements and installed together with it in the female connector housing. It has a flange at one end for fixing. In this way, the plug housing only has to ensure the mechanical protection of the plug connection and no longer has to meet any special requirements with regard to the mechanical accuracy.
  • the device according to the invention ensures simple assembly even under field conditions.
  • the coupling elements can be completely prefabricated in the manufacturing plant.
  • When connecting the light guide it only has to stripped and provided with a flat end surface. With known conventional devices, this operation can be carried out in a very short time of less than a minute.
  • the stripped end of the light guide is then inserted into the hole provided in the molded plastic part.
  • a small amount of an optical cement is deposited, which now enables good contact between the light guide end surface and the end surface of the gradient lens. Due to the subsequent mechanical deformation of the molded plastic part, the light guide is centered and fixed in the coupling element. The entire assembly process takes about 3 minutes.
  • the cross section of the light beam at the coupling point is significantly increased.
  • impairments to the coupling surface due to dust, scratches, etc. only have a minor disadvantage.
  • the optical surface exposed to the surroundings is also covered by a silicon layer. This also acts as an immersion medium and in this way almost completely prevents reflection losses.
  • the invention can appropriate device can be used for all conventional fiber products. Therefore, special adaption parts, as with conventional constructions, are not necessary.
  • the plug connection according to the invention can already be used without an outer housing, since the mutual alignment of the coupling elements is carried out by the spring sleeve.
  • the connector can be used as a semi-permanent connection after being secured by a shrink tube.
  • the arrangement is installed in a floating manner in a suitable connector housing, which then only has to take over the mechanical locking and the strain relief of the outer cable sheath.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
EP80100741A 1979-02-17 1980-02-14 Dispositif de couplage de deux guides d'ondes optiques Withdrawn EP0014960A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792906104 DE2906104C3 (de) 1979-02-17 1979-02-17 Vorrichtung zum Kopppeln zweier Lichtwellenleiter
DE2906104 1979-02-17

Publications (1)

Publication Number Publication Date
EP0014960A1 true EP0014960A1 (fr) 1980-09-03

Family

ID=6063148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100741A Withdrawn EP0014960A1 (fr) 1979-02-17 1980-02-14 Dispositif de couplage de deux guides d'ondes optiques

Country Status (3)

Country Link
EP (1) EP0014960A1 (fr)
JP (1) JPS55113011A (fr)
DE (1) DE2906104C3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456334A1 (fr) * 1979-05-08 1980-12-05 Itt Element de connecteur hermaphrodite pour fibres optiques
EP0095281A2 (fr) * 1982-05-24 1983-11-30 AMP INCORPORATED (a New Jersey corporation) Connecteur pour élément à fibre optique
EP0095280A1 (fr) * 1982-05-24 1983-11-30 AMP INCORPORATED (a Pennsylvania corporation) Connecteur de fibres optiques avec une lentille
EP0110072A2 (fr) * 1982-11-08 1984-06-13 Siemens Aktiengesellschaft Dispositif pour connecter des guides d'ondes lumineuses et des éléments de construction
GB2139377A (en) * 1983-05-07 1984-11-07 Plessey Co Plc Optical connectors
FR2547425A1 (fr) * 1983-06-10 1984-12-14 Socapex Procede et dispositif de centrage relatif d'une fibre optique et d'une lentille dans un embout, et element de connecteur ainsi obtenu
FR2629220A1 (fr) * 1988-03-22 1989-09-29 Socapex Amphenol Dispositif d'assemblage et d'auto-alignement d'une fibre optique et d'un element micro-optique
US7805035B2 (en) * 2006-07-31 2010-09-28 Hitachi Cable, Ltd. Forming method of refractive index matching film

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3141904A1 (de) * 1981-10-22 1983-06-30 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Steckverbinder fuer lichtwellenleiter
DE3230152A1 (de) * 1982-08-13 1984-02-16 Philips Kommunikations Industrie AG, 8500 Nürnberg Mehrfachverbinder fuer lichtwellenleiter
JPS60117205A (ja) * 1983-11-30 1985-06-24 Yamatake Honeywell Co Ltd 光接続装置
JPS6291611U (fr) * 1985-11-29 1987-06-11
JPS6337306A (ja) * 1986-08-01 1988-02-18 Nec Corp 光フアイバコネクタ用レセプタクル
US5734762A (en) * 1995-09-15 1998-03-31 Qualop Systems Corporation Optical isolator system and method
DE19927167A1 (de) * 1999-04-29 2000-11-16 Fraunhofer Ges Forschung Koppelelement zur Kopplung hochintensiver Lichtstrahlung und Verfahren zu dessen Herstellung sowie Anordnung aus Koppelelementen zur Kopplung hochintensiver Lichtstrahlung
DE102014006716A1 (de) 2014-05-05 2015-11-05 Friedrich-Schiller-Universität Jena Verfahren zur Erzeugung einer Lichtkopplung an optischen Fasern durch selbstorganisierendes Photopolymer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829195A (en) * 1973-06-25 1974-08-13 Bell Telephone Labor Inc Optical couplers
DE2360951A1 (de) * 1973-12-06 1975-06-12 Siemens Ag Koppelvorrichtung fuer eine optische nachrichtenuebertragungsanlage
US3937557A (en) * 1974-11-29 1976-02-10 The United States Of America As Represented By The Secretary Of The Navy Star coupler for single mode fiber communication systems
DE2614401A1 (de) * 1975-04-02 1976-10-21 Thomson Csf Anschlusstueck zur positionierung optischer fasern und verfahren zu seiner herstellung
DE2648652A1 (de) * 1975-11-11 1977-05-12 Western Electric Co Verbindungsvorrichtung fuer optische fasern
GB1499359A (en) * 1975-12-23 1978-02-01 Standard Telephones Cables Ltd Optical fibre connectors
DE2828989A1 (de) * 1977-07-05 1979-01-18 Int Standard Electric Corp Ein- oder mehrteilige kupplung fuer lichtleiter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3734594A (en) * 1972-03-29 1973-05-22 Bell Telephone Labor Inc Optical fiber connector
JPS5244207B2 (fr) * 1974-07-17 1977-11-05
GB1480445A (en) * 1975-05-06 1977-07-20 Standard Telephones Cables Ltd Termination of optical fibres
FR2312789A1 (fr) * 1975-05-27 1976-12-24 Lenoane Georges Connecteur pour diode a effet laser dans un systeme de transmission par fibres optiques
GB1537477A (en) * 1975-11-14 1978-12-29 Post Office Dielectric optical waveguide couplings
FR2338500A1 (fr) * 1976-01-14 1977-08-12 Thomson Csf Dispositif de connexion detachable pour fibres optiques
GB1569614A (en) * 1976-02-03 1980-06-18 Standard Telephones Cables Ltd Optical fibre connectors
DE2711171A1 (de) * 1976-03-18 1977-09-29 Smiths Industries Ltd Endstueck einer lichtleitstabvorrichtung
GB1579027A (en) * 1976-05-25 1980-11-12 Combined Optical Ind Ltd Fibre optic waveguide connectors
DE2646010C3 (de) * 1976-10-12 1979-05-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen Magnetische Kupplungsvorrichtung fur Verbindungsstecker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829195A (en) * 1973-06-25 1974-08-13 Bell Telephone Labor Inc Optical couplers
DE2360951A1 (de) * 1973-12-06 1975-06-12 Siemens Ag Koppelvorrichtung fuer eine optische nachrichtenuebertragungsanlage
US3937557A (en) * 1974-11-29 1976-02-10 The United States Of America As Represented By The Secretary Of The Navy Star coupler for single mode fiber communication systems
DE2614401A1 (de) * 1975-04-02 1976-10-21 Thomson Csf Anschlusstueck zur positionierung optischer fasern und verfahren zu seiner herstellung
DE2648652A1 (de) * 1975-11-11 1977-05-12 Western Electric Co Verbindungsvorrichtung fuer optische fasern
GB1499359A (en) * 1975-12-23 1978-02-01 Standard Telephones Cables Ltd Optical fibre connectors
DE2828989A1 (de) * 1977-07-05 1979-01-18 Int Standard Electric Corp Ein- oder mehrteilige kupplung fuer lichtleiter

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456334A1 (fr) * 1979-05-08 1980-12-05 Itt Element de connecteur hermaphrodite pour fibres optiques
EP0095281A2 (fr) * 1982-05-24 1983-11-30 AMP INCORPORATED (a New Jersey corporation) Connecteur pour élément à fibre optique
EP0095280A1 (fr) * 1982-05-24 1983-11-30 AMP INCORPORATED (a Pennsylvania corporation) Connecteur de fibres optiques avec une lentille
EP0095281A3 (en) * 1982-05-24 1984-01-11 Amp Incorporated Connector for fiber optic member
EP0110072A3 (fr) * 1982-11-08 1985-11-13 Siemens Aktiengesellschaft Dispositif pour connecter des guides d'ondes lumineuses et des éléments de construction
EP0110072A2 (fr) * 1982-11-08 1984-06-13 Siemens Aktiengesellschaft Dispositif pour connecter des guides d'ondes lumineuses et des éléments de construction
GB2139377A (en) * 1983-05-07 1984-11-07 Plessey Co Plc Optical connectors
US4732452A (en) * 1983-05-07 1988-03-22 Plessey Overseas Limited Optical connectors
FR2547425A1 (fr) * 1983-06-10 1984-12-14 Socapex Procede et dispositif de centrage relatif d'une fibre optique et d'une lentille dans un embout, et element de connecteur ainsi obtenu
EP0129456A3 (fr) * 1983-06-10 1987-12-02 Socapex Procédé et dispositif de centrage relatif d'une fibre optique et d'une lentille dans un embout, et élément de connecteur ainsi obtenu
EP0129456A2 (fr) * 1983-06-10 1984-12-27 Socapex Procédé et dispositif de centrage relatif d'une fibre optique et d'une lentille dans un embout, et élément de connecteur ainsi obtenu
FR2629220A1 (fr) * 1988-03-22 1989-09-29 Socapex Amphenol Dispositif d'assemblage et d'auto-alignement d'une fibre optique et d'un element micro-optique
US7805035B2 (en) * 2006-07-31 2010-09-28 Hitachi Cable, Ltd. Forming method of refractive index matching film

Also Published As

Publication number Publication date
DE2906104B2 (de) 1981-03-26
JPS55113011A (en) 1980-09-01
DE2906104A1 (de) 1980-08-21
DE2906104C3 (de) 1981-11-26

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19810210

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Effective date: 19830901

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Inventor name: NAGEL, HANS

Inventor name: BECK, RASMUS, DR.